7. Driver’s seat belt reminder buzzer does not work properly, as shown in Table 4-4.
Table 4-4
Symptom Cause
Driver’s seat belt reminder buzzer does
not work properly
1 Faulty instrument cluster
2 Faulty air bag ECU
3 Faulty wiring and connector
4 Faulty seat belt buckle switch
VI. System component check
1. Check the speedometer as shown in Fig. 4-26.
Fig. 4-26
A: Speed sensor maintenance wire socket
B: Speed sensor
C: Speed sensor signal serial port
D: Speed sensor power serial port
E: Speed sensor ground serial port
(1) Prepare maintenance wire and numeral multimeter;
(2) Lift the front of vehicle, reliable support required;
(3) Ignition switch ON-position, shift lever neutral-position;
(4) Turn the wheel, check with multimeter if the voltage is within 0-5V or exceeding the range, if no
signal is detected, change the speed sensor, if the condition is normal, go to step (5);
(5) Observe the speedometer, if the pointer does not work properly, change the instrument cluster.
2. Check the output status of speed signal
(1) Prepare maintenance wire and numeral multimeter;
(2) Lift the front of vehicle, reliable support required;
(3) Ignition switch ON-position, shift lever neutral-position;
(4) Drive the car at 10km/h, and check the voltage between connector terminals 10-C7 and 1-C7
of instrument cluster, normally around 5～14V with a vibration frequency of 14 times/s, if the
response is abnormal, change the instrument cluster or speed sensor.
Note: Do check the output signal with ignition switch ON-position and harness connector
connected.
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